1st of all congratulations on the excellent results, the extent of power range available is amazing [emoji123][emoji123][emoji123] Going for the CP5
kit very soon from Uk and looking for some more enlightenment... Previously i had a 335i N54 with upgraded Hpfp (Helix Overdrive) + Stage 3 Lpfp (double walbro 450) doing 630bhp DI only and now with the Fist going with the S280
kit which should give me around 340/350bhp so i still don't understand very well the aux fuel... Isn't it possible to just upgrade the Hpfp + Lpfp and with the uprated injectors that come with the
kit just run E30 or E40 in the tank and tune for it? The aux fuel either single port or 4 port still uses the OEM system with a controller but i don't understand very well because you still use OEM pumps... I have easy access to Ethanol here in Portugal so just wondering how it works, I can see you upgraded your Lpfp
Amazing results, can't wait to get my
kit!